Assume that the following satisfaction scores of three companies for the 4 quarter of 2010 and 2011 were obtained from the Rochester's Customer Satisfaction Index. Assume that the scores are based on a poll of 100 customers from each company. Because the polling has been done for several years, the standard deviation can be assumed to equal 7 points in each case. (The scores on the following table are hypothetical values for the exam only) Professor Pan is interested in knowing whether the difference in the satisfaction score for Costco from 2010 to 2011 is statistically significant. assume =5%, Provide a 95\% confidence interval for the difference in the satisfaction score for Costco from2010 to 2011 (Please round to two decimal places if necessary). (0.37,3.63) (0.39,3.16) (0.02,3.98) (0.35,3.65) none of the above